206 citations · 5k across the 136 of their papers we have counts for
5 papers · 1 filter
Opinion Formation on a Deterministic Pseudo-fractal Network
M. C. Gonzalez, A. O. Sousa, H. J. Herrmann
The Sznajd model of socio-physics, that only a group of people sharing the same opinion can convince their neighbors, is applied to a scale-free random network modeled by a determi…
Segregation in a fluidized binary granular mixture: Competition between buoyancy and geometric forces
L. Trujillo, M. Alam, H. J. Herrmann
Starting from the hydrodynamic equations of binary granular mixtures, we derive an evolution equation for the relative velocity of the intruders, which is shown to be coupled to th…
Ratcheting of granular materials
F. Alonso-Marroquin, H. J. Herrmann
We investigate the quasi-static mechanical response of soils under cyclic loading using a discrete model of randomly generated convex polygons. This response exhibits a sequence of…
A simple model for a transverse dune field
E. J. R. Parteli, H. J. Herrmann
We present a simple one-dimensional model to describe the evolution of a transverse dune field. The model is characterized by the distances between the dunes and their heights, whi…
Modelling transverse dunes
Veit Schwämmle, Hans J. Herrmann
Transverse dunes appear in regions of mainly unidirectional wind and high sand availability. A dune model is extended to two dimensional calculation of the shear stress. It is appl…